Shortly after the start of transcription, the 5' end of the mRNA being synthesized is bound by a cap-synthesizing complex associated with RNA polymerase. Help us improve this article! Lipids Practice 1 page Review 4 pages Concept 4: The poly A tail and the protein bound to it aid in protecting mRNA from degradation by exonucleases.
Eukaryotic Cell Transcription and translation are spatially and temporally separated in eukaryotic cells; that is, transcription occurs in the nucleus to produce a pre-mRNA molecule. More Information on Germinating Peas Exercise 6: Feedback Control of the lac Operon Concept 9: Processing of mRNA differs greatly among eukaryotes , bacteria , and archea.
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Primary Productivity Concept 4: Types and functions of RNA function of ribosomal molecules In ribosome function in anabolism In metabolism: Filling the Wells Exercise 4: Thank You for Your Contribution! Structure of Young Stems Practice 1 page Concept 10: Building Biomolecules Introduction Concept 1: At the bottom of the article, feel free to list any sources that support your changes, so that we can fully understand their context.
Untranslated regions UTRs are sections of the mRNA before the start codon and after the stop codon that are not translated, termed the five prime untranslated region 5' UTR and three prime untranslated region 3' UTR , respectively.
In eukaryotes organisms that possess a clearly defined nucleus the mRNA molecules are more elaborate. The Vascular Highway Introduction Concept 1: The subtle structural difference between the sugars gives DNA added stability, making DNA more suitable for storage of genetic information, whereas the relative instability of RNA makes it more suitable for its more short-term functions.